► 動詞 山積 [さんせき] [山積する] meaning:accumulaterank:4 ☆ 経済の復興には未だ問題が山積している ⇨ There still are mountains of problems to rebuild the economy (☛ Literally means “accumulate like a mountain”)
More examples:
新政府には既に課題が山積みになっている ⇨ There already are a pile of problems, challenges, for the new government